JPH0624511B2 - Ophthalmic equipment - Google Patents
Ophthalmic equipmentInfo
- Publication number
- JPH0624511B2 JPH0624511B2 JP61066731A JP6673186A JPH0624511B2 JP H0624511 B2 JPH0624511 B2 JP H0624511B2 JP 61066731 A JP61066731 A JP 61066731A JP 6673186 A JP6673186 A JP 6673186A JP H0624511 B2 JPH0624511 B2 JP H0624511B2
- Authority
- JP
- Japan
- Prior art keywords
- radius
- ring
- diaphragm
- curvature
- cornea
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000003287 optical effect Effects 0.000 claims description 32
- 210000004087 cornea Anatomy 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 11
- 230000004907 flux Effects 0.000 description 15
- 238000005259 measurement Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 101100328887 Caenorhabditis elegans col-34 gene Proteins 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Eyeglasses (AREA)
- Eye Examination Apparatus (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は、角膜やコンタクトレンズの曲率半径を自動的
に測定するオートケラトメーターを備えた手術用顕微鏡
等の眼科装置に関する。Description: [Object of the Invention] (Field of Industrial Application) The present invention relates to an ophthalmologic apparatus such as a surgical microscope equipped with an autokeratometer for automatically measuring the radius of curvature of a cornea or a contact lens.
（従来技術） 被検角膜または被検コンタクトレンズに所定半径を有す
るリング状パターンを投影し、このリング状パターンの
角膜による虚像を観察光学系を介して光検出器上に投影
し、投影像の大きさ、形状から被検角膜又は被検コンタ
クトレンズの曲率半系を自動的に測定するオートケラト
メーターが知られている。(Prior Art) A ring-shaped pattern having a predetermined radius is projected onto a cornea to be inspected or a contact lens to be inspected, and a virtual image of the ring-shaped pattern of the cornea is projected onto a photodetector via an observation optical system to obtain a projected image. An autokeratometer is known that automatically measures the curvature half system of the cornea to be inspected or the contact lens to be inspected from the size and shape.
そして、従来のオートケラトメーターでは、被検角膜と
装置との作動距離誤差が測定に影響しないようにするた
めに、上記リング状パターンが無限遠方から投影される
ように光学的に構成されていた。In the conventional autokeratometer, in order to prevent the working distance error between the cornea to be inspected and the device from affecting the measurement, the ring-shaped pattern is optically configured to be projected from infinity.
（発明が解決しようとする問題点） しかし、従来のオートケラトメーターでは、上述のリン
グ状パターン投影型式を有するため、そのパターン投影
系は円環状の投影レンズを必要とし、構造が複雑かつ高
価であった。また、リング状パターンの角膜による虚像
の像高（リング虚像の半径）は角膜の曲率半径により変
化するため、その曲率測定は被検角膜毎に異なる角膜輪
帯上で測定される。それゆえ、一定の半径をもつ輪帯上
で曲率半径を測定する必要のあるコンタクトレンズの測
定や、ＲＫ(Radial Keratotomy)手術時の角膜の測定に
は利用できない欠点があった。(Problems to be Solved by the Invention) However, since the conventional autokeratometer has the above-mentioned ring-shaped pattern projection type, the pattern projection system requires an annular projection lens, and the structure is complicated and expensive. It was Further, since the image height of the virtual image of the ring-shaped cornea (radius of the ring virtual image) changes depending on the radius of curvature of the cornea, the curvature measurement is performed on the corneal zonal zone that differs for each cornea to be examined. Therefore, it has a drawback that it cannot be used for the measurement of a contact lens which needs to measure the radius of curvature on an annulus having a constant radius and the cornea during RK (Radial Keratotomy) surgery.
また、１つの角膜あるいはコンタクトレンズを互に異な
る任意の半径を有する輪帯上でそれぞれの曲率半径を測
定したいときには、従来のオートケラトメーターでは、
異なる半径を有するリングパターンを複数設けなければ
ならず、装置の構成が複雑になる欠点があった。Moreover, when it is desired to measure the respective radii of curvature of one cornea or contact lens on an annulus having an arbitrary radius different from each other, a conventional autokeratometer is used.
Since a plurality of ring patterns having different radii have to be provided, there is a drawback that the structure of the device becomes complicated.
本発明は係る従来の眼科装置の欠点に鑑みなされたもの
で、その第１の目的はリングパターンを有限距離から投
影する形式にしても精度よく曲率半径の測定ができる眼
科装置を提供することにある。The present invention has been made in view of the drawbacks of the conventional ophthalmologic apparatus, and a first object thereof is to provide an ophthalmologic apparatus capable of accurately measuring the radius of curvature even when the ring pattern is projected from a finite distance. is there.
本発明の第２の目的は、常に一定の所定半径の輪帯上で
いずれの被検物の曲率半径の測定ができる眼科装置を提
供することにある。A second object of the present invention is to provide an ophthalmologic apparatus capable of measuring the radius of curvature of any test object on a ring zone having a constant and constant radius.
本発明の第３の目的は、任意の半径の輪帯上で１つの被
検物の曲率半径の測定ができる眼科装置を提供すること
にある。A third object of the present invention is to provide an ophthalmologic apparatus capable of measuring the radius of curvature of one test object on an annular zone having an arbitrary radius.
［発明の構成］ （問題点を解決するための手段） 本発明は上記目的を達成するため、被検眼角膜上にリン
グパターンを有限距離から投影するパターン投影手段
と、対物レンズの焦点位置に配置した第１の絞りと、第
１の絞りと光学的に異なる位置に配置した第２の絞りと
を有し、前記第１の絞りを通過した光束と前記第２の絞
りとを通過した光束のそれぞれを検出する検出手段と、
前記検出手段により求めた各位置情報に基づき被検眼の
角膜形状を演算する演算手段とを有することを特徴とす
る。[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention arranges a pattern projection means for projecting a ring pattern on a cornea of an eye to be examined from a finite distance and a focal position of an objective lens. Of the light flux passing through the first aperture and the light flux passing through the second aperture. Detection means for detecting each,
And a calculating means for calculating the corneal shape of the eye to be inspected based on each position information obtained by the detecting means.
（作 用） 第１の測定光学系により輪帯の半径を知ることができ、
第２の測定光学系により作動距離を知ることができ、リ
ングパターンの虚像位置が決定できるため、これに基づ
いて被検眼の曲率半径を測定できる。(Operation) The radius of the orbicular zone can be known by the first measuring optical system,
Since the working distance can be known by the second measurement optical system and the virtual image position of the ring pattern can be determined, the radius of curvature of the eye to be inspected can be measured based on this.
（実施例） 第１図は本発明に係る眼科装置としてのオートケラトメ
ーターの光学系を示す図であり、パターン投影手段とし
て円環状の蛍光管またはストロボ放電管からなるリング
状光源10と、この光源10からの光束を通過させるリング
パターン11a付のマスク板11を有している。リングパタ
ーン11aからの光束は被検角膜Ｃまたは被検コンタクト
レンズである被検物に投影され、リングパターンの虚像
ｉを作る。第１の観察光学系１は、対物レンズ12と、こ
の対物レンズ12の後側焦点位置に配置された絞り14と、
絞り14の位置に前側焦点を有する結像レンズ15と、その
後方に例えばエリアCCDからなる二次元のポジションセ
ンサーからなる第１の光検出器16とから構成されてい
る。この構成により、光検出器16と虚像ｉは光学的に共
役となる。また、絞り14は、光軸Ｏに平行な光束のみを
光検出器16上に投射するよう作用する。(Embodiment) FIG. 1 is a diagram showing an optical system of an autokeratometer as an ophthalmologic apparatus according to the present invention, in which a ring-shaped light source 10 composed of an annular fluorescent tube or stroboscopic discharge tube as pattern projection means, and this light source. It has a mask plate 11 with a ring pattern 11a that allows the light flux from 10 to pass therethrough. The light flux from the ring pattern 11a is projected onto the cornea C to be inspected or the object to be inspected, which is a contact lens to be inspected, to form a virtual image i of the ring pattern. The first observation optical system 1 includes an objective lens 12, an aperture stop 14 arranged at a rear focal position of the objective lens 12,
It is composed of an imaging lens 15 having a front focal point at the position of the diaphragm 14 and a first photodetector 16 behind it, which is a two-dimensional position sensor composed of an area CCD, for example. With this configuration, the photodetector 16 and the virtual image i are optically conjugated. Further, the diaphragm 14 acts so as to project only the light flux parallel to the optical axis O onto the photodetector 16.
他方、第２の観察光学系２は、前記対物レンズ12と、穴
13aを有する穴開きミラー13と、コリメータレンズ17
と、対物レンズ12及びコリメータレンズ17により予め光
軸Ｏ上に定めた位置Ｐと光学的に共役な位置に配置され
た絞り18と、絞り18の後方に配置された例えばリニア型
またはエリア型のCCDからなるポジションセンサーで構
成された第２の光検出器19とを有する。この第２の観察
光学系２では、位置Ｐから射出された如く振舞う光束の
みを絞り18が通過させ、この通過した光束を光検出器19
上に投影するように作用する。On the other hand, the second observation optical system 2 includes the objective lens 12 and a hole.
A perforated mirror 13 having a 13a and a collimator lens 17
And an aperture stop 18 disposed at a position optically conjugate with a position P predetermined on the optical axis O by the objective lens 12 and the collimator lens 17, and a linear type or an area type disposed behind the aperture stop 18, for example. It has a second photodetector 19 composed of a position sensor composed of a CCD. In the second observation optical system 2, only the light beam that behaves as if it exits from the position P is passed through the diaphragm 18, and the passed light beam is detected by the photodetector 19.
Acts as if projected on.
なお、この様な投影パターン手段や第1,第2の観察光学
系は後述する装置本体としての装置筺体100に装着され
ている。Note that such projection pattern means and the first and second observation optical systems are mounted on the device housing 100 as the device body described later.
上記光学構成により第１の観察光学系１は、虚像ｉから
でて、光軸Ｏに平行な光束Ａの像を第１光検出器16で検
出するため、その投影位置A′と光軸Ｏとの距離ａを検
出することにより虚像ｉの像高ｈを知ることができる。With the above optical configuration, the first observation optical system 1 detects the image of the light flux A parallel to the optical axis O from the virtual image i by the first photodetector 16, so that the projection position A ′ and the optical axis O thereof are detected. The image height h of the virtual image i can be known by detecting the distance a between and.
また、第２の観察光学系２は、角膜Cで反射する反射光
のうち位置Ｐと虚像ｉを結ぶ直線上の光束Ｂのみが絞り
18を通り第２光検出器19に投影されるため、その投影位
置B′と光軸O′との距離ｂを検出することにより、光束
Ｂの角膜Ｃからの反射方向がわかり、光束Ａと光束Ｂの
交点である虚像ｉの位置を一義的に決定できる。それゆ
え、作動距離ｄを知ることができる。Further, the second observation optical system 2 stops only the light flux B on the straight line connecting the position P and the virtual image i among the reflected light reflected by the cornea C.
Since it is projected on the second photodetector 19 via 18, the direction of reflection of the light flux B from the cornea C can be known by detecting the distance b between the projection position B ′ and the optical axis O ′, The position of the virtual image i, which is the intersection of the light flux B, can be uniquely determined. Therefore, the working distance d can be known.
これにより、リングパターン11aの半径をＨ、虚像ｉの
像高ｈとすると図中の角度θ０は として求められる。As a result, when the radius of the ring pattern 11a is H and the image height h of the virtual image i is h, the angle θ 0 in the figure is Is required as.
ここでθ０と像高ｈすなわち半径ｈの輪帯上に投射され
る光束とその反射光束Ａとのなす角θとの差Δθ＝
（θ−θ０）は、作動距離ｄと被検角膜Ｃの曲率半径ｒ
の関数となる。そこで予め既知の曲率半径ｒと作動距離
ｄとの組合せに基づくΔθの換算表を求めておき、まず
最初の測定による被検角膜の曲率半径ｒを で求め、(2)式の曲率半径ｒと作動距離ｄとから前述の
Δθの換算表を用いてΔθを求め、最終的な曲率半径ｒ
を として求める。Here theta 0 and image height h ie the difference of the light beam projected onto the annular zone radius h and the angle theta between the reflected light beams A [Delta] [theta] =
(Θ−θ 0 ) is the working distance d and the radius of curvature r of the cornea C to be examined.
Is a function of. Therefore, a conversion table of Δθ based on a combination of the known radius of curvature r and the working distance d is obtained in advance, and first, the radius of curvature r of the cornea to be measured by the first measurement is calculated. Then, Δθ is calculated from the radius of curvature r and the working distance d of the equation (2) using the conversion table of Δθ described above, and the final radius of curvature r
To Ask as.
所定の半径ｈを有する輪帯でいずれの被検角膜もその曲
率半径を測定したいときは、第１観察光学系の第１光検
出器16の所定半径ｈに対応する検出位置（半径ａ）に投
影光束Ａが位置するまで光学装置を光軸Ｏ方向に沿って
移動させて、半径ａの投影位置上に光束Ａが投影された
とき所定半径ｈの輪帯上に虚像ｉが位置したと判定し、
そのときの第２の観察光学系２の第２光検器19の光束Ｂ
の投影位置Ｂ′から作動距離ｄを求め、第(1)式ないし
第(3)式を使って所定輪帯上での曲率半径測定ができ
る。When it is desired to measure the radius of curvature of any cornea to be measured in an annular zone having a predetermined radius h, the detection position (radius a) corresponding to the predetermined radius h of the first photodetector 16 of the first observation optical system is set. The optical device is moved along the optical axis O direction until the projected light flux A is located, and when the light flux A is projected on the projection position of the radius a, it is determined that the virtual image i is located on the ring zone of the predetermined radius h. Then
Light flux B of the second photodetector 19 of the second observation optical system 2 at that time
The working distance d can be obtained from the projected position B ′ of, and the radius of curvature can be measured on the predetermined ring zone by using the equations (1) to (3).
また１つの被検角膜を異なる任意の半径の複数の輪帯上
で測定したいときは、その輪帯の半径に応じた第１光検
出器への光束Ａの投影されるべき位置を予め定め、その
位置に光束Ａがくるように装置を光軸Ｏ方向に沿って移
動すればよい。Further, when one cornea to be measured is to be measured on a plurality of ring zones having different arbitrary radii, a position where the light flux A should be projected onto the first photodetector according to the radius of the ring zones is predetermined, The device may be moved along the direction of the optical axis O so that the light beam A comes to that position.
第２図は本光学装置の電気制御系を示すブロック図で、
本光学装置の装置本体である装置筺体100は移動機構20
により光軸Ｏ方向に移動可能に構成されている。この移
動機構20は、装置筺体100の雌ネジ部に螺合した送りネ
ジ21と、この送りネジ21を回動するパルスモータ22とか
ら構成されている。FIG. 2 is a block diagram showing an electric control system of this optical device.
The device housing 100, which is the device body of the present optical device, has a moving mechanism 20.
Is configured to be movable in the optical axis O direction. The moving mechanism 20 includes a feed screw 21 screwed into a female screw portion of the device housing 100, and a pulse motor 22 that rotates the feed screw 21.
所定の輪帯で角膜Ｃの曲率半径を測定する場合には演算
制御回路37は、ROM40に予め記憶されている、所定半径
ｈの輪帯に相応する第１光検出器16の投影検出位置Ａ′
（所定半径ａの検出軌跡となる）を読み出して比較器38
へ入力しておき、次にドライバ回路32を作動させて第１
光検出16を走査し、その検出出力をA/D変換器33を介し
てRAM35に一時的に記憶させる。そして、演算制御回路3
7は、RAM35のデータに基づいて検出器16への投影リング
パターンのリング像の中央軌跡を求め、そのデータを比
較器38に出力する。比較器38は、中央軌跡データがRAM4
0から入力されている投影検出位置A′すなわち所定検出
軌跡上にあるか否かを判定し、否の場合は両者のズレ量
に基づいてドライバ回路23を介してパルスモータ22を必
要量回転し装置筺体100を移動させる。When measuring the radius of curvature of the cornea C in a predetermined ring zone, the arithmetic control circuit 37 stores the projection detection position A of the first photodetector 16 which is stored in the ROM 40 in advance and corresponds to the ring zone of the predetermined radius h. ′
Read out (becomes the detection locus of the predetermined radius a) and compare it with the comparator 38.
To the first, then operate the driver circuit 32 to
The photodetector 16 is scanned and the detection output is temporarily stored in the RAM 35 via the A / D converter 33. And the arithmetic control circuit 3
7 obtains the center locus of the ring image of the projected ring pattern on the detector 16 based on the data of the RAM 35, and outputs the data to the comparator 38. The central locus data of the comparator 38 is RAM4.
It is determined whether or not the projection detection position A ′ input from 0, that is, the predetermined detection locus, is entered, and if not, the pulse motor 22 is rotated by the required amount via the driver circuit 23 based on the deviation amount between the two. The device housing 100 is moved.
演算制御回路37は、所定の輪帯上に虚像ｉがくる位置に
装置を移動したことを比較器38が確認すると、ドライバ
回路31を介して第２光検出器19を走査し、その検出デー
タをA/D変換器34を介してRAM36に一時的に記憶させる。
次に演算制御回路37は、RAM36のデータから距離ｂを知
り、以下第(1)式ないし第(3)式を利用して曲率半径ｒを
求め、その結果を表示器39で表示する。なおΔθの換算
表はROM40に予め記憶されている。When the comparator 38 confirms that the device 38 has moved to a position where the virtual image i comes on a predetermined ring zone, the arithmetic control circuit 37 scans the second photodetector 19 via the driver circuit 31 and detects the detected data. Is temporarily stored in the RAM 36 via the A / D converter 34.
Next, the arithmetic control circuit 37 knows the distance b from the data of the RAM 36, obtains the radius of curvature r using the following equations (1) to (3), and displays the result on the display 39. The conversion table of Δθ is stored in the ROM 40 in advance.
任意の輪帯での曲率半径ｒを測定するときは、入力装置
42で任意の輪帯半径hi(ｉ＝１，２，３…ｎ)を入力す
る。これにより、換算器41はROM40に予め記憶されてい
る輪帯半径hiとそれに対応する第１光検出器の投影位置
データA′ｉまたは検出軌跡データai(ｉ＝１，２，３…
ｎ)から入力された輪帯半径hiに対応する検出軌跡デー
タaiを選び出し、その値を比較器38に入力する。以下上
述と同様の動作で任意の輪帯上の曲率半径ｒｉを求め
る。When measuring the radius of curvature r in any ring zone, input device
At 42, an arbitrary ring zone radius hi (i = 1, 2, 3 ... N) is input. As a result, the converter 41 causes the annular zone radius hi prestored in the ROM 40 and the corresponding projection position data A′i of the first photodetector or the detected trajectory data ai (i = 1, 2, 3 ...
The detected locus data ai corresponding to the ring zone radius hi input from (n) is selected and the value is input to the comparator 38. Hereinafter, the curvature radius ri on an arbitrary ring zone is obtained by the same operation as described above.
なお、更に広範囲の輪帯半径上で測定を可能にするため
には、絞り18,第２光検出器19を作動距離に応じて段階
的に光軸に沿って動かす。更に、第１光検出器16も光軸
に沿って動かし、ピントを合わせる様に構成すると良
い。In order to enable measurement over a wider range of ring radii, the diaphragm 18 and the second photodetector 19 are moved stepwise along the optical axis according to the working distance. Further, the first photodetector 16 may also be moved along the optical axis so as to be in focus.
（発明の効果） 本発明によれば、以上説明したように、被検眼角膜上に
リングパターンを有限距離から投影するパターン投影手
段と、対物レンズの焦点位置に配置した第１の絞りと、
第１の絞りと光学的に異なる位置に配置した第２の絞り
とを有し、前記第１の絞りを通過した光束と前記第２の
絞りとを通過した光束のそれぞれを検出する検出手段
と、前記検出手段により求めた各位置情報に基づき被検
眼の角膜形状を演算する演算手段とから眼科装置を構成
したので、有限距離からリングパターンを投影する型式
でも精度よく曲率半径が測定でき、パターン投影系を簡
単にできる眼科装置を提供できる。しかも、所定の輪帯
上で常に曲率半径を測定できる眼科装置を提供できる。(Effect of the Invention) According to the present invention, as described above, the pattern projection means for projecting the ring pattern on the cornea of the eye to be examined from a finite distance, the first diaphragm arranged at the focal position of the objective lens,
A first diaphragm and a second diaphragm arranged at a position optically different from each other, and detecting means for respectively detecting the light flux that has passed through the first diaphragm and the light flux that has passed through the second diaphragm. Since the ophthalmologic apparatus is composed of the arithmetic means for calculating the corneal shape of the eye to be inspected based on each position information obtained by the detecting means, the radius of curvature can be accurately measured even in the type that projects the ring pattern from a finite distance, It is possible to provide an ophthalmologic apparatus having a simple projection system. Moreover, it is possible to provide an ophthalmologic apparatus capable of constantly measuring the radius of curvature on a predetermined ring zone.
また、前記パターン投影手段及び第1,第2の観察光学系
を挿置する装置本体を設け、前記第１の光検出器の検出
データに基づいて前記装置本体を前記光軸に沿って移動
する移動手段が設けられた眼科装置とした場合には、任
意の輪帯上で曲率半径を測定できる眼科装置を提供でき
る。Further, an apparatus main body in which the pattern projection means and the first and second observation optical systems are inserted is provided, and the apparatus main body is moved along the optical axis based on the detection data of the first photodetector. In the case of the ophthalmologic apparatus provided with the moving means, it is possible to provide the ophthalmologic apparatus capable of measuring the radius of curvature on any ring zone.
第１図は本発明に係る眼科装置としてのオートケラトメ
ーターの光学装置を示す図、第２図はその電気系を示す
ブロック図である。 １……第１の観察光学系 ２……第２の観察光学系 10……光源、11a……リングパターン 12……対物レンズ、10……第１の絞り 16……第１の光検出器 18……第２の絞り 19……第２の光検出器 20……移動手段 100……装置筺体（装置本体）FIG. 1 is a diagram showing an optical device of an autokeratometer as an ophthalmologic apparatus according to the present invention, and FIG. 2 is a block diagram showing its electric system. 1 ... First observation optical system 2 ... Second observation optical system 10 ... Light source, 11a ... Ring pattern 12 ... Objective lens, 10 ... First diaphragm 16 ... First photodetector 18 …… Second diaphragm 19 …… Second photodetector 20 …… Moving means 100 …… Device housing (device body)
Claims (2)
から投影するパターン投影手段と、対物レンズの焦点位
置に配置した第１の絞りと、第１の絞りと光学的に異な
る位置に配置した第２の絞りとを有し、前記第１の絞り
を通過した光束と前記第２の絞りとを通過した光束のそ
れぞれを検出する検出手段と、前記検出手段により求め
た各位置情報に基づき被検眼の角膜形状を演算する演算
手段とを有することを特徴とする眼科装置。1. A pattern projecting means for projecting a ring pattern onto a cornea of an eye to be examined from a finite distance, a first diaphragm arranged at a focal position of an objective lens, and a position optically different from the first diaphragm. A detection means for detecting a light beam passing through the first diaphragm and a light beam passing through the second diaphragm; and a target based on each position information obtained by the detecting means. An ophthalmologic apparatus comprising: a calculation unit that calculates a corneal shape of an optometry.
りを有する装置本体を設け、前記検出手段の検出データ
に基づいて前記装置本体を前記光軸に沿って移動する移
動手段が設けられたことを特徴とする特許請求の範囲第
１項に記載の眼科装置。2. A device main body having the pattern projection means and first and second diaphragms is provided, and moving means is provided for moving the device main body along the optical axis based on detection data of the detection means. The ophthalmologic apparatus according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61066731A JPH0624511B2 (en) | 1986-03-25 | 1986-03-25 | Ophthalmic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61066731A JPH0624511B2 (en) | 1986-03-25 | 1986-03-25 | Ophthalmic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62224330A JPS62224330A (en) | 1987-10-02 |
| JPH0624511B2 true JPH0624511B2 (en) | 1994-04-06 |
Family
ID=13324325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61066731A Expired - Lifetime JPH0624511B2 (en) | 1986-03-25 | 1986-03-25 | Ophthalmic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0624511B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3015741U (en) * | 1995-03-13 | 1995-09-12 | 由美子 黒川 | Portable paste button |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0265833A (en) * | 1988-08-31 | 1990-03-06 | Topcon Corp | Automatic keratometer |
| JPH0265832A (en) * | 1988-08-31 | 1990-03-06 | Topcon Corp | Ophthalmic apparatus |
| JP2536127B2 (en) * | 1989-02-17 | 1996-09-18 | オムロン株式会社 | Board inspection equipment |
| BRPI0612383A2 (en) * | 2005-06-30 | 2016-09-06 | Wavefront Sciences Inc | Method and system for measuring the curvature of a surface of an object |
| JP2019170464A (en) * | 2018-03-27 | 2019-10-10 | 株式会社トプコン | Ophthalmologic apparatus |
-
1986
- 1986-03-25 JP JP61066731A patent/JPH0624511B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3015741U (en) * | 1995-03-13 | 1995-09-12 | 由美子 黒川 | Portable paste button |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62224330A (en) | 1987-10-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |